Southampton, NY, June 8, 2026 — Stony Brook Southampton Hospital (SBSH), a member of the Stony Brook Medicine healthcare system, today announced the appointment of Richard Stumacher, MD, MBA, FCCP as Chief Medical Officer (CMO). Dr. Stumacher will serve as the hospital’s senior clinical leader responsible for guiding quality, patient safety, physician engagement and the advancement of clinical programs. He will report directly to Emily Mastaler, Chief Administrative Officer, Stony Brook Southampton Hospital.

“Dr. Stumacher brings exceptional clinical expertise, operational insight and a deep commitment to ethical, patient‑centered care. His leadership experience across complex healthcare systems—and his passion for innovation in areas like AI, inpatient clinical care management and quality improvement—make him an extraordinary addition to our team,” said Ms. Mastaler. “We are thrilled to welcome him to our East End community and are confident he will play a pivotal role in advancing our mission.”

William Wertheim, MD, Executive Vice President at Stony Brook Medicine echoed her sentiments saying, “Dr. Stumacher embodies the values and forward‑thinking leadership that define Stony Brook Medicine. His deep experience in clinical quality and system‑wide innovation aligns perfectly with our commitment to elevating care across the East End. We look forward to the impact he will have as he partners closely with our teams to expand access, strengthen clinical excellence, and support the mission of Stony Brook Southampton Hospital within our growing health system.”
“Dr. Stumacher’s appointment reflects our continued commitment to bringing exceptional clinical leadership to the East End. His deep expertise in quality, safety and individualized care—and his forward‑thinking approach to innovation—will strengthen the connection between Stony Brook University Hospital and Stony Brook Southampton Hospital,” said Carol A. Gomes, Chief Executive Officer, Stony Brook University Hospital. “We are proud to welcome him into this key leadership role and look forward to the positive impact he will have on the communities we serve.”

Dr. Stumacher is a triple board‑certified physician in Internal Medicine, Pulmonary Medicine and Critical Care Medicine, bringing more than 20 years of clinical leadership across hospital operations, ethics and medical innovation. He holds an MBA from Hofstra University in Strategic Healthcare Management and is certified by the American Board of Artificial Intelligence in Medicine; an expertise that will play a critical role in the continued advancement of clinical programs on the East End. He served as Medical Director of Case Management at Stamford Hospital and previously held several senior leadership roles at Northern Westchester Hospital, including Associate Chief Medical Officer, Chief of the Division of Pulmonary and Critical Care Medicine, Chairman of the Medical Board and the Chair of the Ethics Committee. He has held academic appointments at several highly prestigious institutions, including The Zucker School of Medicine at Hofstra / Northwell, Weill Medical College of Cornell University, Albert Einstein College of Medicine, and Fordham University. Dr. Stumacher’s expertise has been featured in NBC News 4 New York, Fox Business, U.S. News & World Report and MedPage Today, reflecting his prominence as a clinician, educator and thought leader. Throughout his career, Dr. Stumacher has launched transformative initiatives in lung cancer screening, pulmonary embolism response systems, smoking cessation and AI‑driven clinical models.

More People on the Move